drivers/pci/compat.c

   1 /*
   2  *      $Id: compat.c,v 1.1 1998/02/16 10:35:50 mj Exp $
   3  *
   4  *      PCI Bus Services -- Function For Backward Compatibility
   5  *
   6  *      Copyright 1998--2000 Martin Mares <mj@suse.cz>
   7  */
   8
   9 #include <linux/types.h>
  10 #include <linux/kernel.h>
  11 #include <linux/pci.h>
  12
  13 int
  14 pcibios_present(void)
  15 {
  16         return !list_empty(&pci_devices);
  17 }
  18
  19 int
  20 pcibios_find_class(unsigned int class, unsigned short index, unsigned char *bus, unsigned char *devfn)
  21 {
  22         const struct pci_dev *dev = NULL;
  23         int cnt = 0;
  24
  25         while ((dev = pci_find_class(class, dev)))
  26                 if (index == cnt++) {
  27                         *bus = dev->bus->number;
  28                         *devfn = dev->devfn;
  29                         return PCIBIOS_SUCCESSFUL;
  30                 }
  31         return PCIBIOS_DEVICE_NOT_FOUND;
  32 }
  33
  34
  35 int
  36 pcibios_find_device(unsigned short vendor, unsigned short device, unsigned short index,
  37                     unsigned char *bus, unsigned char *devfn)
  38 {
  39         const struct pci_dev *dev = NULL;
  40         int cnt = 0;
  41
  42         while ((dev = pci_find_device(vendor, device, dev)))
  43                 if (index == cnt++) {
  44                         *bus = dev->bus->number;
  45                         *devfn = dev->devfn;
  46                         return PCIBIOS_SUCCESSFUL;
  47                 }
  48         return PCIBIOS_DEVICE_NOT_FOUND;
  49 }
  50
  51 #define PCI_OP(rw,size,type)                                                    \
  52 int pcibios_##rw##_config_##size (unsigned char bus, unsigned char dev_fn,      \
  53                                   unsigned char where, unsigned type val)       \
  54 {                                                                               \
  55         struct pci_dev *dev = pci_find_slot(bus, dev_fn);                       \
  56         if (!dev) return PCIBIOS_DEVICE_NOT_FOUND;                              \
  57         return pci_##rw##_config_##size(dev, where, val);                       \
  58 }
  59
  60 PCI_OP(read, byte, char *)
  61 PCI_OP(read, word, short *)
  62 PCI_OP(read, dword, int *)
  63 PCI_OP(write, byte, char)
  64 PCI_OP(write, word, short)
  65 PCI_OP(write, dword, int)